org.springframework.integration.store.MessageGroupQueueTests.java Source code

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Here is the source code for org.springframework.integration.store.MessageGroupQueueTests.java

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/*
 * Copyright 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.integration.store;

import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.Callable;
import java.util.concurrent.CompletionService;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.Ignore;
import org.junit.Test;
import org.springframework.integration.Message;
import org.springframework.integration.message.GenericMessage;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

/**
 * @author Dave Syer
 * @since 2.0
 */
public class MessageGroupQueueTests {

    static final Log logger = LogFactory.getLog(MessageGroupQueueTests.class);

    @Test
    public void testPutAndPoll() throws Exception {
        MessageGroupQueue queue = new MessageGroupQueue(new SimpleMessageStore(), "FOO");
        queue.put(new GenericMessage<String>("foo"));
        Message<?> result = queue.poll(100, TimeUnit.MILLISECONDS);
        assertNotNull(result);
    }

    @Test
    public void testSize() throws Exception {
        MessageGroupQueue queue = new MessageGroupQueue(new SimpleMessageStore(), "FOO");
        queue.put(new GenericMessage<String>("foo"));
        assertEquals(1, queue.size());
        queue.poll(100, TimeUnit.MILLISECONDS);
        assertEquals(0, queue.size());
    }

    @Test
    public void testCapacityAfterExpiry() throws Exception {
        SimpleMessageStore messageGroupStore = new SimpleMessageStore();
        MessageGroupQueue queue = new MessageGroupQueue(messageGroupStore, "FOO", 2);
        queue.put(new GenericMessage<String>("foo"));
        assertEquals(1, queue.remainingCapacity());
        queue.put(new GenericMessage<String>("bar"));
        assertEquals(0, queue.remainingCapacity());
        Message<?> result = queue.poll(100, TimeUnit.MILLISECONDS);
        assertNotNull(result);
        assertEquals(1, queue.remainingCapacity());
    }

    @Test
    public void testCapacityExceeded() throws Exception {
        SimpleMessageStore messageGroupStore = new SimpleMessageStore();
        MessageGroupQueue queue = new MessageGroupQueue(messageGroupStore, "FOO", 1);
        queue.put(new GenericMessage<String>("foo"));
        assertFalse(queue.offer(new GenericMessage<String>("bar"), 100, TimeUnit.MILLISECONDS));
    }

    @Test
    public void testPutAndTake() throws Exception {
        MessageGroupQueue queue = new MessageGroupQueue(new SimpleMessageStore(), "FOO");
        queue.put(new GenericMessage<String>("foo"));
        Message<?> result = queue.take();
        assertNotNull(result);
    }

    @Test
    @Ignore
    public void testConcurrentAccess() throws Exception {
        doTestConcurrentAccess(50, 20, new HashSet<String>());
    }

    @Test
    @Ignore
    public void testConcurrentAccessUniqueResults() throws Exception {
        doTestConcurrentAccess(50, 20, null);
    }

    private void doTestConcurrentAccess(int concurrency, final int maxPerTask, final Set<String> set)
            throws Exception {

        SimpleMessageStore messageGroupStore = new SimpleMessageStore();
        final MessageGroupQueue queue = new MessageGroupQueue(messageGroupStore, "FOO");
        ExecutorService executorService = Executors.newCachedThreadPool();
        CompletionService<Boolean> completionService = new ExecutorCompletionService<Boolean>(executorService);

        for (int i = 0; i < concurrency; i++) {

            final int big = i;

            completionService.submit(new Callable<Boolean>() {
                public Boolean call() throws Exception {
                    boolean result = true;
                    for (int j = 0; j < maxPerTask; j++) {
                        result &= queue.add(new GenericMessage<String>("count=" + big + ":" + j));
                        if (!result) {
                            logger.warn("Failed to add");
                        }
                    }
                    return result;
                }
            });

            completionService.submit(new Callable<Boolean>() {
                public Boolean call() throws Exception {
                    boolean result = true;
                    for (int j = 0; j < maxPerTask; j++) {
                        @SuppressWarnings("unchecked")
                        Message<String> item = (Message<String>) queue.poll(10, TimeUnit.SECONDS);
                        result &= item != null;
                        if (!result) {
                            logger.warn("Failed to poll");
                        } else if (set != null) {
                            synchronized (set) {
                                set.add(item.getPayload());
                            }
                        }
                    }
                    return result;
                }
            });

            messageGroupStore.expireMessageGroups(-10000);

        }

        for (int j = 0; j < 2 * concurrency; j++) {
            assertTrue(completionService.take().get());
        }

        if (set != null) {
            // Ensure all items polled are unique
            assertEquals(concurrency * maxPerTask, set.size());
        }

        assertEquals(0, queue.size());
        messageGroupStore.expireMessageGroups(-10000);
        assertEquals(Integer.MAX_VALUE, queue.remainingCapacity());

        executorService.shutdown();

    }

}